Hyundai: Engine D4FA. Manual — part 48
DIESEL CONTROL SYSTEM
FLA -63
SIGNAL WAVEFORM
Rail Pressure Sensor (RPS) is to provide to the ECM the
voltage signal corresponding to rail pressure.
The change in resistance is preportional to the rail pressure
acting upon the diaphragm and rail pressure increases
as load increases.
APS 1 signal
RPS signal
EFNF550A
FLA -64
FUEL SYSTEM
BOOST PRESSURE SENSOR
(BPS)
BOOST PRESSURE SENSOR (BPS)
E3D1F62F
Boost pressure sensor (BPS) is installed on surge tank to
measure the absolute intake manifold pressure.
BPS input voltage is changed in proportion with absolute
pressure in manifold.
This information is used to control Variable Geometery Tur-
bocharger(VGT) by ECM.
AWJF300J
SPECIFICATION
Pressure (Kpa)
70
140
210
270
1.02 ~ 1.17
2.13 ~ 2.28
3.25 ~ 3.40
4.20 ~ 4.35
Output Voltage (V)
LGJF501E
CIRCUIT DIAGRAM
3
4
C101-1(23)
C101-1(53)
C101-1(13)
C101-1(40)
2
1
GROUND
5V supply
IATS1 Signal
BPS signal
BPS & IATS 2
P
C130
Harness side
1
2
3
4
EGNG114A
DIESEL CONTROL SYSTEM
FLA -65
SIGNAL WAVEFORM
Boost Pressure Sensor Signal
This illustration represents waveform of BPS when
accelerating and decelerating.
EFNF553B
FLA -66
FUEL SYSTEM
INTAKE AIR TEMPERATURE
SENSOR (IATS)
INTAKE AIR TEMPERATURE SENSOR
(IATS)
EF90A524
Intake Air Temperature Sensor (IATS) is Negative Temper-
ature Charcteristics(NTC) thermistor which is installed into
both Mass Air Flow Sensor(MAFS) and Boost Pressure
Sensor(BPS), It senses intake air temperature which are
installed in front of turbocharger (inside of MAFS) and be-
hind it (inside of BPS).
Comparing air temperature from both sensors (one is in-
take air temperature, the other is air temperature passing
through turbo charger), more accurate sensing of intake
air temperature is possible.
ECM uses intake air temperature signal to performs EGR
control correction and fuel injection quantity correction.
BPS & IATS
MAFS & IATS
LGJF501G
SPECIFICATION
[IATS (INSTALLED INTO BPS)]
Temperature℃(℉)
Resistance(kΩ )
-20(-4)
13.89 ~ 16.03
-10(14)
8.50 ~ 9.71
0(32)
5.38 ~ 6.09
10(50)
3.48 ~ 3.90
20(68)
2.31 ~ 2.57
30(86)
1.56 ~ 1.74
40(104)
1.08 ~ 1.21
50(122)
0.76 ~ 0.85
60(140)
0.54 ~ 0.62
70(158)
0.40 ~ 0.45
80(176)
0.29 ~ 0.34
90(194)
0.22 ~ 0.26
100(212)
0.17 ~ 0.20
110(230)
0.13 ~ 0.15
120(248)
0.10 ~ 0.12
130(266)
0.08 ~ 0.10
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